Question

please it i surgent​

Answer 1

Given,

m = 1500 kg

u = 36 kmh^(-1) = 10 ms^(-1)

Since the car is brought to rest after the application of the force, v = 0 ms^(-1)

t = 2 s

We have the acceleration (or retardation),

a = (v - u) / t = (0 - 10) / 2 = - 5 ms^(-2)

Now the force,

F = ma = 1500 × -5 = - 7500 N

We may just have the magnitude, so 7500 N is the answer.